岩石成因与岩石圈演化思考

Pondering over the genesis of rocks and the evolution of lithosphere

岩石圈内能变化导致岩石的形成和消亡。组成岩石圈的三种不同类型岩石的形成和消亡过程在岩石圈表面引起不同的大地构造效应。大洋岩石圈和大陆岩石圈的演化效应存在互补关系:前者内能升高导致岩石形成,反之岩石消亡;后者内能升高导致岩石消亡,反之岩石形成;前者造成平、剖面上均自洋中脊向外变老的岩石序列,后者造成平面上自陆核向外变新,剖面上自重熔界面向上和向下变新的岩石序列。

Variation of intrinsic energy of the lithosphere results in forming and perishing of rocks.Evolution of the three kinds of rocks that constitute the lithosphere produces different tectonic effects on the earth surface,and the evolutional effects on the oceanic and continental crusts are found with complementing relationship： increasing intrinsic energy in the oceanic lithosphere leads to the birth of rocks,otherwise to the perish;and in the continental lithosphere,increasing intrinsic energy leads to the perish of rocks,otherwise to the birth.The former process creates a rock-sequence in which the rocks become older from the mid oceanic ridge outwards either on a horizontal plane or on a vertical section,and the latter produces a rock-sequence in which the rocks become younger from the core of a continent outwards on a horizontal plane and become younger from the MI upwards and downwards on a vertical section.